Can someone me find the y-intercept and explain how you got that answer?

Asap 25 pts + brainlest to right/best answer

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?